360 Messrs. J. Wood-Mason and A. Alcock on 



30. Crangon hengalensiSj sp. n. 



? . Rostrum acuminate triangular, the unarmed tip ex- 

 tending by about half its length beyond the level of the eyes, 

 armed at the sides with three pairs of sharp spines, of which 

 the basal pair is only slightly more distant from the second 

 pair than this is from the third pair. Eyes very short, owing 

 to the reduction in lengtii of the basal joint. 



Median dorsal carina of the carapace divided into five 

 forwardly- directed sharp spines ; subdorsal carinas continuous 

 with the sides of the rostrum, also 5-spinose, with a consider- 

 able unarmed interval between its foremost spine and the 

 basal rostral spine with which it is continuous ; sublateral 

 carinas 3-spinose in their anterior half, ending abruptly some 

 distance from the extra-orbital spines with which they are in 

 line ; lateral carinee continuous with the antennal spines, 

 unis])inose near the anterior end ; marginal carina entire, 

 unarmed, continuous with the branchiostegal spines. The 

 first abdominal tergum is furnished with six anteriorly spinose 

 carinas — two dorsal, two subdorsal, and two sublateral — as 

 well as with unarmed rudiments of two lateral carinte ; the 

 second tergum with three similar cariute, of which one is 

 dorsal and two are subdorsal, as well as with two unarmed 

 sublaterals ; the third and fourth terga have only an obtuse 

 median dorsal carina, w'hich in the latter is produced in the 

 middle line posteriorly into a small point, as well as indistinct 

 remains of sublaterals ; the fifth and sixth have two poste- 

 riorly somewhat divergent sharp dorsal carinas, which in the 

 latter are minutely unispinose rather behind the second third 

 of their length ; the fiith has also two lateral carinse and the 

 sixth one. 



Eyes in spirit dark chocolate-brown. 



Total length from tip of rostrum to tip of telson 44 millim. ; 

 length of carapace from tip of rostrum to middle of posterior 

 margin 13*5 millim., of abdomen to end of telson 30*5 millim. 



One ovigerous female from Station 120, 240 to 276 fathoms. 



31. Crangon andamanensisj sp. n. 



Closely allied to the preceding, from which it differs in the 

 following points : — (1) The two apical pairs of rostral spines 

 are equidistant between the tip of the rostrum and tiie basal 

 pair; (2) the rostrum is not so acuminate, its terminal por- 

 tion being more broadly triangular; (3) the subdorsal carinas 

 of (he carapace are only 4-spinose, the sublaterals are 5-spinose, 

 and tiie laterals are usually bispinose ; (4) the dorsal carina 



